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      11-13-2017, 08:40 PM   #4
dapz325
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Drives: 2008 335i
Join Date: Aug 2013
Location: Louisiana

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swapped o2 would give you a rough idle and make it drive horribly. You make it seem like its not the engine so i would check for any rubbing. If your downpipes are touching by the exhaust side the fabric heat wrap will for sure take care of it .
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